Nailing machine



Feb. 20, 1934. F. L. M cKENZlE 1,947,770

NAILING MACHINE Filed June 7, 1952 Sheets-Sheet 1 Fig.1.

Feb. 20, 1934. F MCKENZIE 1,947,770

NAILING MACHINE Filed June 7, 1932 3 Sheets-Sheet 2 Feb. 20, 1934. F, L, MacKENzE 1,947,770

MAILING MACHINE Filed June 7, 1952 3 Sheets-Sheet 3 I Fig. 5.

100A 'Ff'" 96 as O ff 70 92 9i 00 705 Fig. 6.

Patented Feb. 20, 1934 UNITED STATES NAILING MACHINE Fred L. MacKenzie, Beverly, Masa, assignor to United Shoe Machinery Corporation, Paterson, N. J., a corporation of New Jersey Application June 7, 1932. Serial No. 615,834

35 Claims.

This invention relates to machines for inserting nails or like fastenings in work, being especially concerned with the supplying of nails in machines of the character disclosed in Letters Patent of the United States No. 1,785,928. Benjamin, December 23, 1930, and No. 1,855,405, Mac- Kenzie, April 26, 1932. There are shown and described herein, but not claimed, features which are the subject of the application filed in my name in the United States Patent Office on February 14, 1930, Serial No. 428,529.

My invention has as an object the provision of efficient and reliable nail-supplying mechanism, and particularly such a mechanism which will guard against the delivery of a double load of nails to the inserting mechanism of a heel-attaching or similar machine. To this end, I associate with a raceway or raceways, by which nails are advanced from a source, a movable nail-delivering device, as a separator-plate, means for moving the device in cooperation with the raceway, and a connecting member between the moving means and delivering device, said memberbeing mounted on the moving means for movement with and upon it between an effective connecting position and an ineffective position. Movement to the effective position may be under the power of the machine, which must, therefore, have operated and disposed of previously delivered nails before 30 a succeeding delivery can be made. The connecting member, or means by which the delivering device is more directly actuated, is preferably movable with said device throughout its delivering action, maintaining control of it when it is also under the influence of another means, as a spring, by which yieldable separation of the nails from the raceway is obtained. The removal of the connecting member from engagement with the delivering device to make the latter ineffective may occur during a movement imparted to it different in extent from the movement of the delivering device. In the present embodiment of the invention, this differential travel allows a connecting or contact member in the form of a hook to be withdrawn from engagement with a recess in the delivering device, as by a spring. The specific means shown for restoring the member to its effective position upon operation of the machine and disposal of the load of nails previously supplied is a rotatable cam, this restoring means acting after the movement of the member has been reversed following its excess travel over that of the delivering device, at which time its restoring movement may draw it against an inclined surface of the delivering device, causing the displacement of the latter and allowing the hook or other connecting member to force the delivering device aside against the force of its spring and to enter the recess or otherwise establish actuating engagement. I have further improved the organization by utilizing a member which upon movement in one direction controls the driving mechanism through which the machine is operated to also control the nail-supplying mechanism upon movement in a different direction, the latter control preferably being exercised under the power of the machine, and further utilize this treadle-operated member to govern the movement of a nail-retaining member or shutter I may also employ a common means, as a spring connecting the two elements, for moving the retaining member and a latch which maintains said member normally closed.

In the accompanying drawings, a specific form of my-improved machine is illustrated,

Fig. 1 being a side elevation of its upper portion, with parts broken way;

Fig. 2, a similar view of the lower portion of the machine;

F Fig. 3, a sectional detail on the line I1IIII of Fig. 4, an enlarged detail in broken side elevation showing particularly the shutter-controlling elements;

Fig. 5, a like view with parts broken away to better disclose the inner elements;

Fig. 6, an enlarged end elevation of the separating mechanism; and

Fig. '7, a broken top plan view of said separating mechanism.

As corresponding generally in character to the structures of the patents previously mentioned, there are shown in the drawings a frame F carrying a jack J, in which operates the usual naildrivers 10; a vertically movable pressure-abutment P, by which a heel may be held in place upon a. jacked shoe for nailing; power mechanism M through which a inain power-shaft 11 may be rotated to actuate the drivers 10 and move the abutment P to apply clamping pressure to the work; a distributor D from which the attaching nails are supplied, and loading mechanism L for receiving nails from thedistributor and transferring them to the jack. 7

At the distributor D, nails delivered from a rotatable drum 13 are fed to slotted raceways 14, down which they pass hanging by their heads. Mounted to slide across the ends of the raceways is a delivering device in the form of a separator or picker-plate 15 having inclined nail-receiving slots 16 co-operating with the raceways. Normally, the plate is at one extreme of its travel, with the open ends of'the slots alined with the corresponding raceways to receive the nails therefrom. When the plate is reciprocated, each slot picks off the terminal nail from the raceway, and when an opening 18 at the opposite extremity of the slot comes into registration with an opening in an end-block 22, a nail drops from the plate through the end-block and into one of a group of tubes 24 leading to passages in a foot-plate 26, through which delivery is made to the loading mechanism L. An expansion-spring 28 acts upon the separator-plate to urge it to the delivering position truth the openings alined, the extent of the movement being determined by a stop-screw 29.

The separator-plate is moved in the direction opposite that under the influence of the spring from a power-shaft 30 at the loading mechanism. This shaft has fastened upon it a cam 32, with the periphery of which contacts a roll 34 upon the end of one arm of a bell-crank-lever 36 fulcrumed upon the frame. Pivoted to the opposite arm of the lever is a vertical rod 38 articulated at its upper extremity toa substantially horizontal arm of a bell-crank-lever 40 fulcrumed upon the distributor-frame. A spring 41 surrounding the rod 38 lifts said rod and turns the lever 36 so the roll 34 is kept in constant engagement with the cam 32. A vertical arm of the lever 40 carries pivoted upon it a hooked connecting member 42, which may be moved into and out of engagement with the separator-plate to actuate it under the influence of the cam 32 or to prevent such actuation. The hook 42 may be raised out of engagement with the plate by a torsion-spring. 44 surrounding its pivotal mounting. Engagement between the separator-plate and hook is established by means of the following connections: At the outer side of the hook is a projection 46, which enters a longitudinal slot 48 in a link 50. The link, at its lower extremity, is pivotally joined to a lever 52 fulcrumed upon the distributor-frame. Through an opening in the lever at the end opposite the link passes a rod 54, which, when elevated, will swing the lever yieldably through a spring 56, this lowering the link and, by contact of the upper end of the slot 48 with the projection 46, pulling down the hook. The upward movement of the rod is preferably effected by a cam 58 rotatable by the main power-shaft 11 when the pressure and driving mechanisms are in operation and havingaprojection which contacts with the edge of a vertical link 60 pivotally joined to the rear of a treadle 62 and drawn against the cam by a spring 63. En gagernent of the main clutch of the power mechanism is controlled by a projection 61 from the link 60. After the shaft 11 has made one turn, contact of the cam with the link separates the link-projection from theclutch mechanism and the machine stops. The treadle also has connected to it a rod 64, by which the abutment P is lowered into preliminary contact with the work. When the link 60 is swung by the cam 58 at the beginning of a power-cycle of the machine to the right, as viewed in Fig. 3 of the drawings, one 01' through the spring 56, the lever 52 contraclockwise (Fig. 1) to yieldably lower the link 50 and the hook 42. In its descent, the point of the hook contacts with an inclined surface 72 upon a projection 74 from the separator-plate 15, and forces the plate to the right against the spring 28. Beneath the surface 72 is a recess '76 in the projection '74, and when the point of the hook has passed the surface 72 and is horizontally alined with the recess, the spring 23 returns the separator-plate, holding the hook in engagement with the recess, ready for movement by the lever 40 and its connections. During this movement to the right (Figs. 6 and '7) under the power of the machine the nails are not picked from the raceways, but the spring 28 is energized in preparation for the active separating travel in the opposite direction. In the latter movement the spring 28, by its yield, avoids injury to the parts if clogging occurs. During the separating movement under the influence of the spring, the cam 32 still exercises control, since the connections between the cam and the plate-lever 40 prevent the spring from acting more abruptly than the contour of the cam permits.

After a separating stroke of the plate 15 has been completed, the hook 42 is to be released from the projection 74 to avoid a repeated naildelivering action before the nails previously supplied have been used. For this purpose, the contour of the cam 32 is such that the travel which it allows the hook 42 to the left (Figs. 6 and 7) under the influence of the spring 41 is greater than the movement of the plate 15 by the spring 28, as determined by the stop-screw 29. The difi'erence is suflicient to carry the hook from beneath the overhang of the recess '76. While the elements are thus separated, the spring 44 raises the hook above the projection, and actuation of the hook by the lever 40 and its connections is without effect upon the separator-plate until re-engagement of the hook with the plate has been produced as a consequence of the operation of the machine.

At the foot-plate 26, the nails picked off by the plate 15 and dropped through the tubes 24 are temporarily supported upon a shutter or retaining member sliding beneath it. Movable horizontally below the foot-plate from a position in which its nail-receiving passages 82 are alined with the foot-plate-passages to one in which they register with the driver-passages in thejack J, is a loader-block 84 carried by a reciprocatory slide 86 guided for horizontal movement upon the frame F. The loader-block may be given a complete reciprocation from its nail-receiving position to its nail-delivering position and return by gearing and clutch mechanism m (Fig. 4), as in the previously mentioned patents. This is accomplished under the control of a lever 88 movable by the operator to initiate the transfer of a load of nails from the foot-plate to the jack. In the loader-block, the nails are supported upon a shutter 90, which is movable to release them by contact with the jack, and which is re-set to its retaining position by engagement with a fixed element during return to its initial position.

Movement of the shutter 80 to release the nails through discharge-openings in it is made dependent upon both the driving from-the jack of thenails previously delivered by the loaderblock and the correct registration of said block with the foot-plate. The former I prefer to control with the hook 42 from the power-movement of the link 60 connected'to the treadle and-the latter by the position of the loader-slide. A link 92 (Fig. 5) joins the shutter 80 to a lever 94 fulcrumed above the slide 86 and. from one side of which is a projection 96. Fulcrumed just above the slide is a three-armed lever 98, a vertical arm of which has a fork 100 receiving the projection 96, a forwardly extending arm being provided with a contact-piece 102, and a rearwardly extending arm carrying a roll 104. In the nail-receiving position of the loader-block, a depression 106 in the upper part of the slide 86 is vertically alined with the roll. Co-operating with the contact-piece 102 is a pivoted latch 108. A tension-spring 110 joining the latch and shutter tends to open the latter, but normally prevents this by maintaining the latch against a stop 112 and above the contact-piece 102, so the levers 98 and 94 cannot move. But when the operator has depressed the treadle 62 to cause the nailing operation of the machine, thus freeing the jack from the previously delivered nails, the rotation of the cam 58 and elevation of the rod 54, in addition to preparing the nail-delivering means at the distributor D for the next operation, causes a collar 114 fixed upon the rod to strike a horizontal arm upon the latch 108 and turn it to release the lever 98. This permits the spring 110 to actuate the shutter 80, so the openings in it register with the foot-plate-passages and the loader-block-passages, to allow the nails which it supports to drop into the last-mentioned passages, provided they are in the correct relation and, therefore, the depression 106 in the slide 86 is ready to receive the roll 104. If the passages are not alined, the depression. will not be in registration with the roll, and the lever 98 is prevented from turning by engagement of the roll with the upper edge of the slide. The operation of the shutter is therefore prevented, and the nails retained until the defect is corrected. When the slide travels forward for the succeeding transfer of nails after their receipt by the loader-block, the depression cams the roll up to the top of the slide 86 and closes the shutter 80, at the same time lowering the opposite extremity of the lever 98 and placing the contact-piece 102 in position to be latched by the member 108. This member 108 is released by the descent of the collar 114 immediately after its elevation, as the projection of the cam 58 leaves the link 60, so the spring 110 draws the latch above the contact-piece. The shutter is thus held closed for the succeeding operation against the force of the same spring that actuates the latch.

Considering a complete operating cycle of the apparatus, the plate 15 is initially engaged by the hook 42, ready for its separating movement (Fig. 1) The loader-block 84 is beneath the footplate 26, and contains in its passages a load of nails resting upon the closed shutter 90. The lever 98 is unlatched, the roll 104 lying in the depression 106 in the loader-slide, and the shutter 80 is open. The operator, with a shoe in his hands ready to be jacked, shifts the lever 88,

shaft 30 of the mechanism m rotates, it turns the cam 32 to lower the rod 38. The hook 42 thereupon is reciprocated to carry the plate 15 across the raceways and then to permit the spring 28 to return it and yieldably pick off a load of nails, which fall upon the now closed shutter 80. In the return separating movement, the hook travels farther than the plate, so its point is disengaged from the plate-recess 76 by the spring 44, after which the cam 32 allows the hook to return above the plate-surface '72 (Fig. 6). The operator jacks the shoe, places a heel to be attached upon its heel-seat, and depresses the treadle62 to lower the abutment P by the link 64 and apply to the work preliminary pressure.

Continued depression of the treadle turns it about the link 64 as a fulcrum and raises the link 60,'the slot 66 causing the lever 70 to be unaffected. The link-projection 61 trips the clutch of the main driving mechanism M, and the shaft 11 rotates once, placing clamping pressure upon the work, and then elevating the drivers 10 to force through the heel-seat of the shoe the nails which the loader-block has just delivered to the jack. While this is occurring and the pressure and driving mechanisms are being restored to their initial positions to allow the removal of the heeled shoe from the jack, the cam 58 upon the shaft 11 is acting upon the side of the link to turn the lever and raise the rod 54. The point of the hook is thus lowered against the inclined surface 72, forcing the separating plate 15 aside, so the hook, with the co-operation of the spring 28, re-engages the plate-recess '76 ready for its next nail-separating action. This, it may be seen, can only occur after the machine has operated and the previously delivered nails are driven out of the jack, so the jack-passages are empty and ready to receive another load of nails. The collar 114, lifted by the rod 54, strikes the latch 108 and moves this aside to free the lever 98. The loader-block and foot-plate passages being in registration and therefore the slidedepression 106 below the lever-roll 104, this allows the spring 110 to open the shutter 80, and the nails fall into the passages of the loader-block 84. They are now ready for immediate delivery to the jack J as soon as the lever 88 is moved to bring about the succeeding operating cycle.

Having described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. The combination with a raceway, of a movable nail-delivering device co-operating therewith, means for moving the delivering device in co-operation with the raceway, and a member for connecting the moving means and delivering device, said member being mounted on the moving means for movement with and upon it between an effective connecting position and an ineffective position.

'2. The combination with a raceway, of a movable nail-delivering device co-operating therewith, means for moving the delivering device in co-operation with the raceway, a member for connecting the moving means and delivering device, and means operable under the power of the machine for moving the member from a position in which it is disengaged from the delivering device to an effective engaging position.

3. The combination with a raceway, of a movable nail-delivering device co-operating therewith, an actuating member movable with the delivering devicethroughoutits delivering action,

and means for moving the member into and out of engagement with the delivering device.

4. The combination with a raceway, of a movable nail-delivering device co-operating therewith, an actuating member movable with the delivering device, means for moving the member into and out of engagement with the delivering device, and means for moving the member in engagement with the delivering device to effect its travel.

5. The combination with a raceway, of a movable nail-delivering device co -operating therewith, an actuating member movable with the delivering device, means for moving the member into and out of engagement with the delivering device, means for moving the member in engagement with the delivering device to effect its travel in one direction, and means for moving the delivering device in the opposite direction.

6. The combination with a raceway, of a movable nail-delivering device co-operating therewith, an actuating member movable with the delivering device throughout its delivering action, means for moving the member into and out of engagement with the delivering device, and means for moving the member under the power of the machine in engagement with the delivering device to effect its travel, and a spring for moving the delivering device in the opposite direction.

7. The combination with a raceway, of a movable nail-delivering device co-operating therewith, an actuating member movable relatively thereto, means operating under the power of the machine for moving the member into engagement with the delivering device, and means for moving the member in engagement with the delivering device to effect the travel of said device.

8. The combination with a raceway, of a movable nail-delivering device co-operating therewith, an actuating member movable relatively thereto, means operating under the power of the machine for moving the member into engagement with the delivering device, a spring arranged to separate the actuating member fromthe delivering device, and means for moving the member in engagement with the delivering device to eilect the travel of said device.

9. The combination with a raceway, of a movable nail-delivering device cooperating therewith, means for moving the delivering device in co-operation with the raceway, a member for connnecting the moving means and delivering device, other means for moving the delivering device, and means for moving the connecting member to an extent difierent from the delivering device under the influence of said other moving means.

10. The combination with a raceway, of a movable nail-delivering device co-operating therewith, means for moving the delivering device in co-operation with the raceway, a member for connecting the moving means and delivering device, other means for moving the delivering device, and means for moving the connecting member to an extent difierent from the delivering device under the influence of said other moving means and for reversing such movement after the movement of the delivering device has ceased.

11. The combination with a raceway, of a movable nail-delivering device co-operating there with, means for moving the delivering device in co-operation with the raceway, a member for connecting the moving means and delivering device, other means for moving the delivering device, means for moving the connecting member to an extent difierent from the delivering device under the influence of said other moving means, and means for moving the connecting member to separate it from the delivering device.

12. The combination with a raceway, of a movable nail-deliverying device co-operating therewith, means for moving the delivering device in co-operation with the raceway, a member for connecting the moving means and delivering device, other means for moving the delivering device, means for moving the connecting member to a greater extent than the delivering device under the influence of said other moving means, and means for separating the connecting member from the delivering device during such excess of travel.

13. The combination with a raceway, of a movable nail-delivering device co-operating therewith, means for moving the delivering device in co-operation with the raceway, a member for connecting the moving means and delivering device, other means for moving the delivering device, means for moving the connecting member to a greater extent than the delivering device under the influence of said other moving means and for reversing such movement after the movement of the delivering device has ceased, means for separating the connecting member from the delivering device during its excess of travel, and means for restoring the engagement after its reverse movement.

14. The combination with a raceway, of a movable nail-delivering device co-operating therewith, an actuating member movable with the delivering device, means for moving the member into and out of engagement with the delivering device, means for moving the member in engagement with the delivering device to effect its travel in one direction, means for moving the delivering device in the opposite direction, and means for moving the actuating member in said opposite direction through a greater distance than the delivering device is moved to effect its release therefrom.

15. The combination with a raceway, of a movable nail-delivering device co-operating .therewith, an actuating member movable with the delivering device, means for moving the member into and out of engagement with the delivering device, means for moving the member in engagement with the delivering device to efiect its travel in one direction, means for moving the delivering device in the opposite direction, and means for moving the actuating member in said opposite direction through a greater distance than the delivering device is moved to effect its release therefrom and for reversing such movement in preparation for reengagement.

16. The combination with a raceway, of a movable nail-delivering device co-operating therewith, means for moving the delivering device in co-operation with the raceway, a member for connecting the moving means and delivering device, other means for moving the delivering device, means for moving the connecting member to a greater extent than the delivering device under the influence of said other moving means, and a spring for separating the connecting member from the delivering device during such excess of travel.

17. The combination with a raceway, of a movable nail-delivering device co-operating therewith, means for moving the delivering device in co-operation with the raceway, a member for which is an inclined surface, a spring for moving connecting the moving means and delivering device, other means for moving the delivering device, meansfor moving the connecting member to a greater extent than the delivering device under the influence of said other movin means and for reversing such movement after the movement ofthe delivering device has ceased, a spring arranged to separate the connecting member from the delivering device during its excess of travel, and means operating under the power of the machine for restoring the engagement of the connecting member after its reverse movement.

18. The combination with a raceway, of a fastening-delivering device co-operating therewith, a member movable into and out of engagement with the delivering device, means for moving the member to shift the delivering device in one direction, and a spring for moving the delivering device in the opposite direction, said spring yielding to permit engagement of the member with the delivering device.

19. The combination with a raceway, of a separator-plate movable in co-operation with the raceway and provided with a contact-surface, an oscillatory actuating lever, a connecting member movable upon the lever, and means for moving the member upon the lever into and out of engagement with the contact-surface.

20. The combination with a raceway, of a separator-plate movable in co-operation with the raceway and provided with a contact-surface, an oscillatory actuating lever, a connecting member movable upon the lever, and a cam acting upon the member to effect its engagement with the separator-plate.

21. The combination with a raceway, of a separator-plate movable in co-operation with the raceway and provided with a contact-surface, an oscillatory actuating lever, a connecting member movable upon the lever, a cam acting upon the member to efiect its engagement with the separator-plate, and a spring for removing the member from engagement with the separator-plate.

22. The combination with a raceway, of a separator-plate movable in co-operation with the raceway and provided with a contact-surface, a member for engagement with the surface, a cam arranged to move the member and with it the separator-plate in one direction, and a spring for moving the separator-plate in the opposite direction, the cam permitting a travel of the member greater than that of the plate under the influence of the spring and thereafter returning the member for the co-operation of the separatorplate.

23. The combination with a raceway, of a yieldable separator-plate movable in co-operation with the raceway and provided with a recess adjacent to which is an inclined surface, a reciprocat-ory hook, and means for forcing the hook against the inclined surface to displace the plate for engagement with the recess.

24. The combination with a raceway, of a separator-plate movable in co-operation with the raceway and provided with a recess adjacent to the separator-plate in one direction, a reciprocatory hook for moving the separator-plate in the opposite direction against the force of the spring,

and means for forcing the hook against the inclined surface to compress the spring and permit the hook to enter the recess.

25. In a nailing machine, clutch mechanism through which the machine is driven, a treadle, a member movable in different directions, it being operable bythe treadle upon movement in one direction to control the clutch mechanism, nailsupplying mechanism, and connections to the member; made effective in its movement in a direction other than that governing the clutch mechanism for controlling the nail-supplying mechanism. .7 4

26. In a nailing machine, clutch mechanism through which the machine is driven, a treadle, a member operable by the treadle to control the clutch mechanism, nail-supplying mechanism, connections to the member for controlling the nail-supplying mechanism, and means movable under the power of the machine for imparting to the connections their controlling movement.

27. In a nailing machine, clutch mechanism through which the machine is driven, a treadle, a link movable by the treadle and having means for controlling the clutch mechanism, nail-supplying mechanism, a rod for controlling said supplying mechanism, connections between the link and rod, and means acting upon the link to shift the rod.

28. In a nailing machine, clutch mechanism through which the machine is driven, a treadle, a link pivoted upon the treadle and being movable longitudinally thereby to control the clutch mechanism, nail-supplying mechanism, and means for moving the link upon its pivot to control the nail-supplying mechanism.

29. In a nailing machine, clutch mechanism through which the machine is driven, a treadle, a link pivoted upon the treadle and being movable longitudinally thereby to control the clutch mechanism, nail-supplying mechanism, a cam rotatable to move the link about its pivot, and connections between the link and nail-supplying mechanism.

30. In a nailing machine, clutch mechanism through which the machine is driven, a treadle, a link pivoted upon the treadle and being movable longitudinally thereby to control the clutch mechanism, nail-supplying mechanism, a cam rotatable to move the link about its pivot, a lever having a slotted connection with the link, and a rod movable by the lever and controlling the supplying mechanism.

31. In a nailing machine, clutch mechanism through which the machine is driven, a treadle, a member operable by the treadle to control the clutch mechanism, nail-supplying mechanism, nail-transferring mechanism to which the supplying mechanism delivers, a nail-retaining member interposed between the supplying and transferring mechanisms, and connections to the treadle-operated member for controlling the supplying mechanism and retaining member.

32. In a nailing machine, clutch mechanism through which the machine is driven, a treadle, a link movable by the treadle and having means for controlling the clutch mechanism, nail-supplying mechanism, a rod for controlling said supplying mechanism, connections between the link and rod, nail-transferring mechanism, a nail-retaining member interposed between the supplying and transferring mechanisms, and a contact member carried by the rod and controlling the retaining member.

33. In a heel-attaching machine, a nail-distributor, a movable loader, a nail-retaining shutter movable between the distributor and loader, a latch arranged to maintain the shutter normally closed, and means common to both for moving the shutter and latch.

34. In a heel-attaching machine, a nail-distributor, a movable loader, a nail-retaining shutter movable between the distributor and loader, a latch arranged to maintain the shutter normally closed, and a spring exerting its force upon both the shutter and latch.

FRED L. MACKENZIE. 

